Google Maps , function calling, event listener

Question

Ive been trying to remove the GEvent.listener and make the function getaddress to run automatically but had no success, how could i call the getaddress function to run automatically?

var map; 
var geocoder; 
var address; 

function initialize() { 
  map = new GMap2(document.getElementById("map_canvas")); 
  map.setCenter(new GLatLng(40.730885,-73.997383), 15); 
  map.addControl(new GLargeMapControl); 
  GEvent.addListener(map, "click", getAddress); 
  geocoder = new GClientGeocoder(); 
} 

function getAddress(overlay, latlng) { 
  if (latlng != null) { 
    address = latlng; 
    geocoder.getLocations(latlng, showAddress); 
  } 
} 

function showAddress(response) { 
  map.clearOverlays(); 
  if (!response || response.Status.code != 200) { 
    alert("Status Code:" + response.Status.code); 
  } else { 
    place = response.Placemark[0]; 
    point = new GLatLng(place.Point.coordinates[1],place.Point.coordinates[0]); 
    marker = new GMarker(point); 
    map.addOverlay(marker); 
    marker.openInfoWindowHtml( 
        '<b>orig latlng:</b>' + response.name + '<br/>' +  
        '<b>latlng:</b>' + place.Point.coordinates[1] + "," + place.Point.coordinates[0] + '<br>' + 
        '<b>Status Code:</b>' + response.Status.code + '<br>' + 
        '<b>Status Request:</b>' + response.Status.request + '<br>' + 
        '<b>Address:</b>' + place.address + '<br>' + 
        '<b>Accuracy:</b>' + place.AddressDetails.Accuracy + '<br>' + 
        '<b>Country code:</b> ' + place.AddressDetails.Country.CountryNameCode); 
  } 
}